/**
* Generate a new keypair
*
* @param int $type Key flags
* @param &string $secret_key - Reference to optional variable to store secret key in
* @return KeyPair
* @throws CryptoException\InvalidKey
*/
public static function generate($type = Key::CRYPTO_BOX, &$secret_key = null)
{
if (Key::doesNotHaveFlag($type, Key::ASYMMETRIC)) {
throw new CryptoException\InvalidKey('An asymmetric key type must be passed to KeyPair::generate()');
}
if (Key::hasFlag($type, Key::ENCRYPTION)) {
$key = EncryptionSecretKey::generate(Key::CRYPTO_BOX, $secret_key);
$keypair = new EncryptionKeyPair(...$key);
return $keypair;
}
throw new CryptoException\InvalidKey('Only encryption keys can be generated.');
}
